test_transitions_and_restyles.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=1030993

-->

<head>

  <meta charset="utf-8">

  <title>Test for Bug 1030993</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

  <style>

  #display {

    background: blue; height: 10px; width: 0; color: black;

    transition: width linear 1s, color linear 1s;

  </style>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1030993">Mozilla Bug 1030993</a>

<p id="display"></p>

<pre id="test">

</pre>

<script type="application/javascript">

/** Test for Bug 1030993 **/

function advance_clock(milliseconds) {

  SpecialPowers.DOMWindowUtils.advanceTimeAndRefresh(milliseconds);

var p = document.getElementById("display");

var cs = getComputedStyle(p, "");

advance_clock(0);

cs.width; // flush

p.style.width = "1000px"; // initiate transition

is(cs.width, "0px", "transition at 0ms"); // flush (and test)

advance_clock(100);

is(cs.width, "100px", "transition at 100ms"); // flush

// restyle *and* trigger new transitions

p.style.color = "blue";

// flush again, at the same timestamp

is(cs.width, "100px", "transition at 100ms, after restyle");

SpecialPowers.DOMWindowUtils.restoreNormalRefresh();

</script>

</body>

</html>